**Mayfly Species Neoleptophlebia mollis (Jenny Spinner)**

Mayflies

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Taxonomic Navigation -?-

Kingdom Animalia (Animals)

» Phylum Arthropoda (Arthropods)

» Class Insecta (Insects)

» Order Ephemeroptera (Mayflies)

» Family Leptophlebiidae (Blue Quills and Mahogany Duns)

» Genus Neoleptophlebia

» Species mollis (Jenny Spinner)

Common Names

Match	Common Name
	Jenny Spinner
	Blue Dun
	Iron Blue Quill
	Iron Blue Dun
	Gray Quill

Pictures Below ↓

This species often emerges together with Paraleptophlebia strigula and Paraleptophlebia guttata, and the combined effect can be a good fishable hatch. The latter two are much less famous than mollis, but Knopp and Cormier say they are more reliable.

Where & When

Regions: East, Midwest

Time Of Year (?): Late May through August; best in June

This species begins to emerge soon after Paraleptophlebia adoptiva has finished.

Hatching Behavior

Time Of Day (?): Late morning to midday

The duns ride the surface for a long time before flying away. The Leonards report in Mayflies of Michigan Trout Streams that trout feed heavily on Paraleptophlebia mollis duns.

Spinner Behavior

Time Of Day: Late afternoon

The male spinners have a unique look: most of their abdominal segments are white.

Nymph Biology

Current Speed: Slow

Environmental Tolerance: Tolerant of warm water

Pictures of 1 Mayfly Specimen in the Species Neoleptophlebia mollis:

Male Neoleptophlebia mollis (Jenny Spinner) Mayfly Dun

View 6 Pictures

Collected June 8, 2005 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on May 26, 2006

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Jargon Defined:

Duns: Mayflies have two adult stages. They first emerge from the water as duns (scientifically known as the subimago stage). They then molt into the spinner (imago) stage, in which they mate and die. Sometimes the word "dun" is confusingly used to refer to a brownish gray color in fly tying materials.

Useful References:

Arbona, Fred Jr. 1989. Mayflies, the Angler, and the Trout. Nick Lyons Books.

Caucci, Al and Nastasi, Bob. 2004. Hatches II. The Lyons Press.

Knopp, Malcolm and Robert Cormier. 1997. Mayflies: An Angler's Study of Trout Water Ephemeroptera . The Lyons Press.

Leonard, Justin W. and Fannie A. Leonard. 1962. Mayflies of Michigan Trout Streams. Cranbrook Institute of Science.

Schwiebert, Ernest G. 1955. Matching the Hatch. MacMillan Publishing Company.